摘要：Previous studies interpreting the meanings of the sentence-final particle“le”displayed two trends:either excessively complicated or excessively *** some scholars established a theoretical foundation of propositional domain,epistemic domain and dialogic domain for the sentence-final particle“le”,the nature or orientation of its semantic property has become more ***,there are also defects in the current“Three Domains”research *** the first place,this model defines the meanings of the sentence-final particle“le”as“emergence of new propositional content”,“emergence of new epistemic content”,and“emergence of new dialogic content”.But,the definition is excessively abstract and *** many sentences not concluded with the particle“le”can also express the three mentioned meanings,it fails to explain the difference between sentences ended with particle“le”and ones without ***,the model fails to explore and discuss the nature or generation mechanism of relevant meanings of the particle“le”.This study attempts to find a practical solution to those defects.